Robert Vaughn and Jill Ireland in The Man from U.N.C.L.E. (1964)

The Quadripartite Affair

UNCLE agents Napoleon Solo and Illya Kuraykin face a four-cornered conspiracy comprised of an ambitious woman (Gervaise Ravel), her wealthy boyfriend (Harold Bufferton), a disgraced military officer and a scientist who has devised a chemical that induces fear. Solo and Kuryakin are helped by the daughter (Marion Raven) of a man killed as a result of the conspiracy.